兵器材料科学与工程
兵器材料科學與工程
병기재료과학여공정
Ordnance Material Science and Engineering
2013年
5期
33-36,37
,共5页
杨哲%杨永顺%虞跨海%梁斌%康兴国
楊哲%楊永順%虞跨海%樑斌%康興國
양철%양영순%우과해%량빈%강흥국
闭孔泡沫铝%准静态压缩%力学特性%吸能性能%有限元仿真
閉孔泡沫鋁%準靜態壓縮%力學特性%吸能性能%有限元倣真
폐공포말려%준정태압축%역학특성%흡능성능%유한원방진
closed-cell aluminum foam%quasi-static compression%mechanical properties%energy absorption performance%finite element simulation
用DEFORM-3D有限元软件对闭孔泡沫铝的压缩行为进行模拟,探讨不同孔隙率和孔径对压缩力学特性的影响,研究孔隙率、孔径对能量吸收和吸能效率的影响。结果表明:在准静态条件下,闭孔泡沫铝的压缩过程存在线弹性阶段、塑性平台阶段和致密化阶段;闭孔泡沫铝的抗压缩能力、吸收能力随着孔隙率的减小而增强;当孔隙率为50%,孔径分别为1.0、2.0、3.0 mm,孔径对闭孔泡沫铝的压缩性能和吸能性能影响不大;将理想吸能效率曲线和吸能效率曲线结合可以选择合适的缓冲材料,并发挥其最好吸能特性。
用DEFORM-3D有限元軟件對閉孔泡沫鋁的壓縮行為進行模擬,探討不同孔隙率和孔徑對壓縮力學特性的影響,研究孔隙率、孔徑對能量吸收和吸能效率的影響。結果錶明:在準靜態條件下,閉孔泡沫鋁的壓縮過程存在線彈性階段、塑性平檯階段和緻密化階段;閉孔泡沫鋁的抗壓縮能力、吸收能力隨著孔隙率的減小而增彊;噹孔隙率為50%,孔徑分彆為1.0、2.0、3.0 mm,孔徑對閉孔泡沫鋁的壓縮性能和吸能性能影響不大;將理想吸能效率麯線和吸能效率麯線結閤可以選擇閤適的緩遲材料,併髮揮其最好吸能特性。
용DEFORM-3D유한원연건대폐공포말려적압축행위진행모의,탐토불동공극솔화공경대압축역학특성적영향,연구공극솔、공경대능량흡수화흡능효솔적영향。결과표명:재준정태조건하,폐공포말려적압축과정존재선탄성계단、소성평태계단화치밀화계단;폐공포말려적항압축능력、흡수능력수착공극솔적감소이증강;당공극솔위50%,공경분별위1.0、2.0、3.0 mm,공경대폐공포말려적압축성능화흡능성능영향불대;장이상흡능효솔곡선화흡능효솔곡선결합가이선택합괄적완충재료,병발휘기최호흡능특성。
Compression behavior of closed-cell aluminum foam was simulated by finite element software DEFORM-3D. The effects of different porosities and cell size on the compressive mechanical responses,energy absorption and energy absorption efficiency of closed-cell aluminum foam were discussed. Results show that the quasi-static compressive process of closed-cell aluminum foam is characterized by three deformation stages:linear elastic stage,plastic platform stage and densification stage. The anti compressive capacity and energy absorption capacity of closed-cell aluminum foam increase with the decrease of porosity. When the porosity of aluminum foam is 50%and the cell size is 1.0,2.0,3.0 mm,the cell size has no obvious effects on the mechanical properties and energy absorption characteristic. The combination of ideal energy absorption efficiency curves and energy absorption efficiency curve can contribute to selecting a suitable buffer material and showing its best energy absorption characteristics.